dc.contributor.author |
Gevers, C.R. (Caitlin)
|
|
dc.contributor.author |
Slippers, Bernard
|
|
dc.contributor.author |
Germishuizen, Ilaria
|
|
dc.contributor.author |
Dittrich-Schroder, Gudrun
|
|
dc.contributor.author |
Hurley, Brett Phillip
|
|
dc.date.accessioned |
2023-09-05T05:44:08Z |
|
dc.date.available |
2023-09-05T05:44:08Z |
|
dc.date.issued |
2022 |
|
dc.description.abstract |
Leptocybe invasa is an invasive gall wasp and pest of Eucalyptus trees, which has become widely distributed in Africa, Asia, Europe and the Americas. Several other wasp species have been found to co-occur in L. invasa-induced galls. In South Africa, this includes an introduced biological control agent, Selitrichodes neseri; two known, accidentally introduced parasitoids, Megastigmus zebrinus and Quadrastichus mendeli; and M. pretorianensis, whose role in the gall is uncertain. In addition to the gall associates, a second lineage of L. invasa or cryptic species was discovered in South Africa in 2015. To determine the distribution and prevalence of these species across South Africa, a national monitoring scheme was initiated. Galled Eucalyptus material was collected at infested sites and emerging adults were collected and identified. Morphology, DNA barcoding and polymerase chain reaction (PCR) Restriction Fragment Length Polymorphism analyses were used to differentiate between the species and lineages. Results from the first two sampling periods indicated that L. invasa lineage A has spread throughout South Africa while lineage B had a more limited distribution in the country. Subsequent samples recorded the further spread of L. invasa Lineage B, which now occurs in all provinces sampled. The Leptocybe lineages were found to co-occur on individual trees, increasing the potential for admixture. From the Eucalyptus genotypes sampled, there was no indication of differences in host association between the Leptocybe lineages. Selitrichodes neseri, M. zebrinus and M. pretorianensis were present throughout South Africa and emerged from trees that contained both Leptocybe lineages, but their frequency varied with site. This study will inform future distribution of parasitoids as well as monitoring of potential changes in plant host resistance, admixture and parasitoid resistance in future. |
en_US |
dc.description.department |
Biochemistry |
en_US |
dc.description.department |
Forestry and Agricultural Biotechnology Institute (FABI) |
en_US |
dc.description.department |
Genetics |
en_US |
dc.description.department |
Microbiology and Plant Pathology |
en_US |
dc.description.department |
Zoology and Entomology |
en_US |
dc.description.librarian |
hj2023 |
en_US |
dc.description.sponsorship |
The Department of Science and
Innovation–National Research Foundation, Centre of Excellence
in Plant Health Biotechnology and Forestry South Africa (FSA). |
en_US |
dc.description.uri |
http://www.tandfonline.com/loi/tsfs20 |
en_US |
dc.identifier.citation |
Caitlin R Gevers, Bernard Slippers, Ilaria Germishuizen, Gudrun
Dittrich-Schrӧder & Brett P Hurley (2021) The distribution and diversity of Leptocybe invasa
(Hymenoptera: Eulophidae) and its gall associates in South Africa, Southern Forests: a Journal
of Forest Science, 83:3, 196-204, DOI: 10.2989/20702620.2021.1944395. |
en_US |
dc.identifier.issn |
2070-2620 (print) |
|
dc.identifier.issn |
2070-2639 (online) |
|
dc.identifier.other |
10.2989/20702620.2021.1944395 |
|
dc.identifier.uri |
http://hdl.handle.net/2263/92202 |
|
dc.language.iso |
en |
en_US |
dc.publisher |
NISC (Pty) Ltd and Informa UK Limited (trading as Taylor and Francis Group) |
en_US |
dc.rights |
© 2022 NISC (Pty) Ltd. This is an electronic version of an article published in Southern Forests, vol. 83, no. 3, pp. 196-204, 2022, DOI: 10.2989/20702620.2021.1944395. Southern Forests is available online at : http://www.tandfonline.comloi/tsfs20. |
en_US |
dc.subject |
Gall wasp |
en_US |
dc.subject |
Parasitoid foraging |
en_US |
dc.subject |
Leptocybe |
en_US |
dc.subject |
Selitrichodes |
en_US |
dc.subject |
Megastigmus |
en_US |
dc.subject |
Quadrastichus |
en_US |
dc.subject |
Eucalyptus trees |
en_US |
dc.subject |
SDG-15: Life on land |
en_US |
dc.title |
The distribution and diversity of Leptocybe invasa (Hymenoptera: Eulophidae) and its gall associates in South Africa |
en_US |
dc.type |
Postprint Article |
en_US |